﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * FCKIECleanup Class: a generic class used as a tool to remove IE leaks.
 */

var    FCKIECleanup = function( attachWindow )
{
    // If the attachWindow already have a cleanup object, just use that one.
    if ( attachWindow._FCKCleanupObj )
        this.Items = attachWindow._FCKCleanupObj.Items ;
    else
    {
        this.Items = new Array() ;

        attachWindow._FCKCleanupObj = this ;
        FCKTools.AddEventListenerEx( attachWindow, 'unload', FCKIECleanup_Cleanup ) ;
//        attachWindow.attachEvent( 'onunload', FCKIECleanup_Cleanup ) ;
    }
}

FCKIECleanup.prototype.AddItem = function( dirtyItem, cleanupFunction )
{
    this.Items.push( [ dirtyItem, cleanupFunction ] ) ;
}

function FCKIECleanup_Cleanup()
{
    if ( !this._FCKCleanupObj || ( FCKConfig.MsWebBrowserControlCompat && !window.FCKUnloadFlag ) )
        return ;

    var aItems = this._FCKCleanupObj.Items ;

    while ( aItems.length > 0 )
    {

        // It is important to remove from the end to the beginning (pop()),
        // because of the order things get created in the editor. In the code,
        // elements in deeper position in the DOM are placed at the end of the
        // cleanup function, so we must cleanup then first, otherwise IE could
        // throw some crazy memory errors (IE bug).
        var oItem = aItems.pop() ;
        if ( oItem )
            oItem[1].call( oItem[0] ) ;
    }

    this._FCKCleanupObj = null ;

    if ( CollectGarbage )
        CollectGarbage() ;
}
